Optical image capturing system

Abstract

A six-piece optical lens for capturing image and a six-piece optical module for capturing image are provided. In order from an object side to an image side, the optical lens along the optical axis includes a first lens with refractive power, a second lens with refractive power, a third lens with refractive power, a fourth lens with refractive power, a fifth lens with refractive power and a sixth lens with refractive power. At least one of the image-side surface and object-side surface of each of the six lens elements is aspheric. The optical lens can increase aperture value and improve the imagining quality for use in compact cameras.

What is claimed is: 
     
       1. An optical image capturing system, from an object side to an image side, comprising:
 a first lens element with positive refractive power; 
 a second lens element with negative refractive power; 
 a third lens element with negative refractive power; 
 a fourth lens element with positive refractive power; 
 a fifth lens element with positive refractive power; 
 a sixth lens element with negative refractive power; and 
 an image plane; 
 wherein the optical image capturing system comprises only six lens elements with refractive power, a maximum height for image formation on the image plane perpendicular to the optical axis in the optical image capturing system is denoted by HOI, at least two lens elements among the first through sixth lens elements have at least one inflection point on at least one surface thereof, focal lengths of the first through sixth lens elements are f1, f2, f3, f4, f5 and f6 respectively, a focal length of the optical image capturing system is f, an entrance pupil diameter of the optical image capturing system is HEP, a distance on an optical axis from an axial point on an object-side surface of the first lens element to an axial point on the image plane is HOS, a half of a maximum view angle of the optical image capturing system is HAF, thicknesses in parallel with an optical axis of the first through sixth lens elements at a distance from the optical axis of ½ HEP respectively are ETP1, ETP2, ETP3, ETP4, ETP5 and ETP6, a sum of ETP1 to ETP6 described above is SETP, thicknesses of the first through sixth lens elements on the optical axis respectively are TP1, TP2, TP3, TP4, TP5 and TP6, a sum of TP1 to TP6 described above is STP, and the following relations are satisfied: 1.0≤f/HEP≤1.9, 0 deg<HAF≤150 deg and 0.5≤SETP/STP<1, and 
 wherein the first lens element has a convex object-side surface, the third lens element has a convex object-side surface, the fifth lens element has a convex image-side surface, and the sixth lens element has a convex object-side surface and a concave image-side surface. 
 
     
     
       2. The optical image capturing system of  claim 1 , wherein a horizontal distance in parallel with the optical axis from a coordinate point on the object-side surface of the first lens element at the distance from the optical axis of ½ HEP to the image plane is ETL, a horizontal distance in parallel with the optical axis from a coordinate point on the object-side surface of the first lens element at the distance from the optical axis of ½ HEP to a coordinate point on the image-side surface of the sixth lens element at the distance from the optical axis of ½ HEP is EIN, and the following relation is satisfied: 0.2≤EIN/ETL<1. 
     
     
       3. The optical image capturing system of  claim 2 , wherein the thicknesses in parallel with the optical axis of the first through sixth lens elements at the distance from the optical axis of ½ HEP respectively are ETP1, ETP2, ETP3, ETP4, ETP5 and ETP6, the sum of ETP1 to ETP6 described above is SETP, and the following relation is satisfied: 0.3≤SETP/EIN<1. 
     
     
       4. The optical image capturing system of  claim 1 , wherein the optical image capturing system comprises a light filtration element, the light filtration element is located between the sixth lens element and the image plane, a distance in parallel with the optical axis from a coordinate point on the image-side surface of the sixth lens element at the distance from the optical axis of ½ HEP to the light filtration element is EIR, a distance in parallel with the optical axis from an axial point on the image-side surface of the sixth lens element to the light filtration element is PIR, and the following relation is satisfied: 0.1≤EIR/PIR≤1.1. 
     
     
       5. The optical image capturing system of  claim 1 , wherein a thickness of the fourth lens element on the optical axis is TP4, a thickness of the fifth lens element on the optical axis is TP5, a thickness of the sixth lens element on the optical axis is TP6, and the following relations are satisfied: TP4≥TP5 and TP4≥TP6. 
     
     
       6. The optical image capturing system of  claim 1 , wherein contrast transfer rates of modulation transfer with space frequencies of 55 cycles/mm (MTF values) of a visible light at the optical axis on the image plane, 0.3 HOI and 0.7 HOI are respectively denoted by MTFE0, MTFE3 and MTFE7, and the following relations are satisfied: MTFE0≥0.2, MTFE3≥0.01 and MTFE7≥0.01. 
     
     
       7. The optical image capturing system of  claim 1 , wherein a half of maximum view angle of the optical image capturing system is HAF, and the following relation is satisfied: 0 deg<HAF≤100 deg. 
     
     
       8. The optical image capturing system of  claim 1 , wherein a horizontal distance in parallel with the optical axis from a coordinate point on the image-side surface of the sixth lens element at the distance from the optical axis of ½ HEP to the image plane is EBL, a horizontal distance in parallel with the optical axis from an axial point on the image-side surface of the sixth lens element to the image plane is BL, and the following relation is satisfied: 0.1≤EBL/BL<1.1. 
     
     
       9. The optical image capturing system of  claim 1 , further comprising an aperture stop, a distance from the aperture stop to the image plane on the optical axis is InS, an image sensing device is disposed on the image plane, a distance perpendicular to the optical axis between each of the inflection points and the optical axis is HIF, and the following relations are satisfied: 0.1≤InS/HOS≤1.1 and 0≤HIF/HOI≤0.9. 
     
     
       10. An optical image capturing system, from an object side to an image side, comprising:
 a first lens element with positive refractive power; 
 a second lens element with negative refractive power; 
 a third lens element with negative refractive power; 
 a fourth lens element with positive refractive power; 
 a fifth lens element with positive refractive power; 
 a sixth lens element with negative refractive power; and 
 an image plane; 
 wherein the optical image capturing system comprises only six lens elements with refractive power, a maximum height for image formation on the image plane perpendicular to the optical axis in the optical image capturing system is denoted by HOI, at least two lens elements among the first through sixth lens element have at least one inflection point on at least one surface thereof, focal lengths of the first through sixth lens elements are f1, f2, f3, f4, f5 and f6 respectively, a focal length of the optical image capturing system is f, an entrance pupil diameter of the optical image capturing system is HEP, a distance on an optical axis from an axial point on an object-side surface of the first lens element to an axial point on the image plane is HOS, a half of a maximum view angle of the optical image capturing system is HAF, a horizontal distance in parallel with the optical axis from a coordinate point on the object-side surface of the first lens element at a distance from the optical axis of ½ HEP to the image plane is ETL, a horizontal distance in parallel with the optical axis from a coordinate point on the object-side surface of the first lens element at the distance from the optical axis of ½ HEP to a coordinate point on the image-side surface of the sixth lens element at the distance from the optical axis of ½ HEP is EIN, and the following relations are satisfied: 1.0≤f/HEP≤1.9, 0 deg<HAF≤150 deg and 0.2≤EIN/ETL<1, and 
 wherein the first lens element has a convex object-side surface, the third lens element has a convex object-side surface, the fifth lens element has a convex image-side surface, and the sixth lens element has a convex object-side surface and a concave image-side surface. 
 
     
     
       11. The optical image capturing system of  claim 10 , wherein a horizontal distance in parallel with the optical axis from a coordinate point on the image-side surface of the fifth lens element at the distance from the optical axis of ½ HEP to a coordinate point on the object-side surface of the sixth lens element at the distance from the optical axis of ½ HEP is ED56, a distance from the fifth lens element to the sixth lens element on the optical axis is IN56, and the following relation is satisfied: 0<ED56/IN56≤50. 
     
     
       12. The optical image capturing system of  claim 10 , wherein a horizontal distance in parallel with the optical axis from a coordinate point on the image-side surface of the first lens element at the distance from the optical axis of ½ HEP to a coordinate point on the object-side surface of the second lens element at the distance from the optical axis of ½ HEP is ED12, a distance from the first lens element to the second lens element on the optical axis is IN12, and the following relation is satisfied: 0<ED12/IN12<10. 
     
     
       13. The optical image capturing system of  claim 10 , wherein a thickness in parallel with the optical axis of the second lens element at the distance from the optical axis of ½ HEP is ETP2, a thickness of the second lens element on the optical axis is TP2, and the following relation is satisfied: 0<ETP2/TP2≤3. 
     
     
       14. The optical image capturing system of  claim 10 , wherein a thickness in parallel with the optical axis of the fifth lens element at the distance from the optical axis of ½ HEP is ETP5, a thickness of the fifth lens element on the optical axis is TP5, and the following relation is satisfied: 0<ETP5/TP5≤3. 
     
     
       15. The optical image capturing system of  claim 10 , wherein a thickness in parallel with the optical axis of the sixth lens element at the distance from the optical axis of ½ HEP is ETP6, a thickness of the sixth lens element on the optical axis is TP6, and the following relation is satisfied: 0<ETP6/TP6≤5. 
     
     
       16. The optical image capturing system of  claim 10 , wherein a distance from the first lens element to the second lens element on the optical axis is IN12, and the following relation is satisfied: 0<IN12/f≤60. 
     
     
       17. The optical image capturing system of  claim 10 , wherein contrast transfer rates of modulation transfer with spatial frequencies of 55 cycles/mm of an infrared operation wavelength 850 nm at the optical axis on the image plane, 0.3 HOI and 0.7 HOI are respectively denoted by MTFI0, MTFI3 and MTFI7, and the following relations are satisfied: MTFI≥0.01, MTFI3≥0.01 and MTFI7≥0.01. 
     
     
       18. The optical image capturing system of  claim 10 , wherein contrast transfer rates of modulation transfer with space frequencies of 110 cycles/mm of a visible light at the optical axis on the image plane, 0.3 HOI and 0.7 HOI are respectively denoted by MTFQ0, MTFQ3 and MTFQ7, and the following relations are satisfied: MTFQ≥0.2, MTFQ3≥0.01 and MTFQ7≥0.01. 
     
     
       19. The optical image capturing system of  claim 10 , wherein at least one of the first, the second, the third, the fourth, the fifth and the sixth lens elements is a light filtration element with a wavelength of less than 500 nm. 
     
     
       20. An optical image capturing system, from an object side to an image side, comprising:
 a first lens element with positive refractive power; 
 a second lens element with negative refractive power; 
 a third lens element with negative refractive power; 
 a fourth lens element with positive refractive power; 
 a fifth lens element with positive refractive power; 
 a sixth lens element with negative refractive power, and 
 an image plane; 
 wherein the optical image capturing system comprises only six lens elements with refractive power and at least three lens elements of the six lens elements are made of glass material, a maximum height for image formation on the image plane perpendicular to the optical axis in the optical image capturing system is denoted by HOI, at least three lens elements among the first through sixth lens elements respectively have at least one inflection point on at least one surface thereof, and focal lengths of the first through sixth lens elements are f1, f2, f3, f4, f5 and f6 respectively, a focal length of the optical image capturing system is f, an entrance pupil diameter of the optical image capturing system is HEP, a half of maximum view angle of the optical image capturing system is HAF, a distance on an optical axis from an axial point on an object-side surface of the first lens element to an axial point on the image plane is HOS, a horizontal distance in parallel with the optical axis from a coordinate point on the object-side surface of the first lens element at the distance from the optical axis of ½ HEP to the image plane is ETL, a horizontal distance in parallel with the optical axis from a coordinate point on the object-side surface of the first lens element at the distance from the optical axis of ½ HEP to a coordinate point on the image-side surface of the sixth lens element at the distance from the optical axis of ½ HEP is EIN, and the following relations are satisfied: 1.0≤f/HEP≤1.9, 0 deg<HAF≤150 deg and 0.2≤EIN/ETL<1, and 
 wherein the first lens element has a convex object-side surface, the third lens element has a convex object-side surface, the fifth lens element has a convex image-side surface, and the sixth lens element has a convex object-side surface and a concave image-side surface. 
 
     
     
       21. The optical image capturing system of  claim 20 , wherein a horizontal distance in parallel with the optical axis from a coordinate point on the image-side surface of the sixth lens element at the distance from the optical axis of ½ HEP to the image plane is EBL, a horizontal distance in parallel with the optical axis from an axial point on the image-side surface of the sixth lens element to the image plane is BL, and the following relation is satisfied: 0.1≤EBL/BL≤1.1. 
     
     
       22. The optical image capturing system of  claim 20 , wherein a distance from the fourth lens element to the fifth lens element on the optical axis is IN45, a distance from the fifth lens element to the sixth lens element on the optical axis is IN56, a horizontal distance in parallel with the optical axis from a coordinate point on the image-side surface of the fourth lens element at the distance from the optical axis of ½ HEP to a coordinate point on the object-side surface of the fifth lens element at the distance from the optical axis of ½ HEP is ED45, a horizontal distance in parallel with the optical axis from a coordinate point on the image-side surface of the fifth lens element at the distance from the optical axis of ½ HEP to a coordinate point on the object-side surface of the sixth lens element at the distance from the optical axis of ½ HEP is ED56, a thickness in parallel with the optical axis of the fourth lens element at a distance from the optical axis of ½ HEP is ETP4, a thickness in parallel with the optical axis of the fifth lens element at the distance from the optical axis of ½ HEP is ETP5, a thickness in parallel with the optical axis of the sixth lens element at the distance from the optical axis of ½ HEP is ETP6, a thickness of the fourth lens element on the optical axis is TP4, a thickness of the fifth lens element on the optical axis is TP5, a thickness of the sixth lens element on the optical axis is TP6, and the following relation is satisfied: (ETP4+ED45+ETP5+ED56+ETP6)>(TP4+IN45+TP5+IN56+TP6). 
     
     
       23. The optical image capturing system of  claim 20 , wherein a distance from the fifth lens element to the sixth lens element on the optical axis is IN56, and the following relation is satisfied: 0<IN56/f≤5.0. 
     
     
       24. The optical image capturing system of  claim 20 , wherein a thickness of the fourth lens element on the optical axis is TP4, a thickness of the fifth lens element on the optical axis is TP5, a thickness of the sixth lens element on the optical axis is TP6, and the following relation is satisfied: TP4≥TP6 or TP5≥TP6. 
     
     
       25. The optical image capturing system of  claim 20 , further comprising an aperture stop, an image sensing device and a driving module, the image sensing device is disposed on the image plane, a distance from the aperture stop to the image plane on the optical axis is InS, the driving module and the six lens elements couple to each other and shifts are produced for the six lens elements, and the following relation is satisfied: 0.1≤InS/HOS≤1.1.